Sebuah toko buku membeli 4 lusin buku Rp. 15.600,00 per lusin. Berapa harga jual setiap buku jika total keuntungan Rp. 240.000,00
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4 lusin = 15.600 + 240.000
4 lusin = 255.600
1 lusin = 63.900
1 buah = 5.325
48 -> 240.000
jawab :
* 1lusin : 12
12x4 = 48
48x15.600 = 748.800
748.800 : 15.600 = 48